 /*******************************************************************************
  * Copyright (c) 2007 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  ******************************************************************************/

 package org.eclipse.ui.internal;

 import java.util.Set ;

 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.jface.preference.IPreferenceStore;
 import org.eclipse.ui.IMemento;
 import org.eclipse.ui.IWorkbenchPage;
 import org.eclipse.ui.IWorkbenchPreferenceConstants;
 import org.eclipse.ui.PartInitException;
 import org.eclipse.ui.internal.util.PrefUtil;
 import org.eclipse.ui.views.IStickyViewDescriptor;
 import org.eclipse.ui.views.IViewRegistry;

 /**
  * @since 3.3
  *
  */
 public class StickyViewManager implements IStickyViewManager {
     
     private IWorkbenchPage page;
     
     public StickyViewManager(IWorkbenchPage page) {
         this.page = page;
     }

     
     public static IStickyViewManager getInstance(IWorkbenchPage page) {
         IStickyViewManager stickyViewMan;
         IPreferenceStore preferenceStore = PrefUtil.getAPIPreferenceStore();
         boolean enable32Behavior = preferenceStore
                 .getBoolean(IWorkbenchPreferenceConstants.ENABLE_32_STICKY_CLOSE_BEHAVIOR);
         if (enable32Behavior)
             stickyViewMan = new StickyViewManager32(page);
         else
             stickyViewMan = new StickyViewManager(page);
         
         return stickyViewMan;
     }
     
     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.internal.IStickyViewManager#add(java.lang.String,
      * java.util.Set)
      */
     public void add(String perspectiveId, Set stickyViewSet) {
         // do nothing
 }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.internal.IStickyViewManager#clear()
      */
     public void clear() {
         // do nothing
 }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.internal.IStickyViewManager#remove(java.lang.String)
      */
     public void remove(String perspectiveId) {
         // do nothing
 }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.internal.IStickyViewManager#restore(org.eclipse.ui.IMemento)
      */
     public void restore(IMemento memento) {
         // do nothing
 }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.internal.IStickyViewManager#save(org.eclipse.ui.IMemento)
      */
     public void save(IMemento memento) {
         // do nothing
 }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.internal.IStickyViewManager#update(org.eclipse.ui.internal.Perspective,
      * org.eclipse.ui.internal.Perspective)
      */
     public void update(Perspective oldPersp, Perspective newPersp) {
         if (oldPersp == null || newPersp == null) {
             return;
         }
         IViewRegistry viewReg = WorkbenchPlugin.getDefault().getViewRegistry();
         IStickyViewDescriptor[] stickyDescs = viewReg.getStickyViews();
         for (int i = 0; i < stickyDescs.length; i++) {
             final String viewId = stickyDescs[i].getId();
             try {
                 // show a sticky view if it was in the last perspective and
 // hasn't already been activated in this one
 if (oldPersp.findView(viewId) != null) {
                     page.showView(viewId, null, IWorkbenchPage.VIEW_CREATE);
                 }
                 // remove a view if it's sticky and its not visible in the old
 // perspective
 else if (newPersp.findView(viewId) != null
                         && oldPersp.findView(viewId) == null) {
                     page.hideView(newPersp.findView(viewId));
                 }
             } catch (PartInitException e) {
                 WorkbenchPlugin
                         .log(
                                 "Could not open view :" + viewId, new Status(IStatus.ERROR, WorkbenchPlugin.PI_WORKBENCH, IStatus.ERROR, "Could not open view :" + viewId, e)); //$NON-NLS-1$ //$NON-NLS-2$
 }
         }
     }

 }

